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ratchet |
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ratchetMechanical device that transmits intermittent motion or permits a shaft to rotate in one direction but not in the opposite one. Reversible ratchets are used on socket wrench handles and are convenient for tightening or loosening bolts in positions where a complete revolution of a wrench handle is impossible. They are used in mechanical jacks to lock the jack rod after each successive lift. ratchet 1. a device in which a toothed rack or wheel is engaged by a pawl to permit motion in one direction only 2. the toothed rack or wheel forming part of such a device ratchet [′rach·ət] (design engineering) A wheel, usually toothed, operating with a catch or a pawl so as to rotate in only a single direction. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| He refilled the clip, threw a cartridge into the chamber, and, with the trigger at full cock, thrust up the safety ratchet. Perhaps he's one of those creatures who've slipped the ratchet off the motion cog. |
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